Switches: Includes power off/on switch to enable system turn on (press on switch), UPS battery test (press on switch during normal AC operation), buzzer silence (press on switch during battery operation) and off (press off switch) - all switch functions require that the switch be pressed and held for longer than 2 seconds, but less than 4 seconds

Low voltage transfer to battery power: Maintains continuous operation during undervoltages as low as 65V (80V at load levels over 70%). Below this switchover point, output is supported from battery-derived AC power

High voltage transfer to battery power: Maintains continuous operation without using battery power during overvoltages to 138V. Above this point, output is supported from battery-derived AC power

Cold Start: Yes, inverter can be "cold started" to enable temporary AC output during a power failure